INTRODUCTION Polytetrafluoroethylene (PTFE), a highly crystalline polymer with melting temperature around 330°C, possesses unique properties. Chemically inert, it has high chemical and heat resistance with upper service temperature around 260°C. Since its invention it has found limited applications especially as an additive because of its high molecular weight and inert surface. However, by mid...

Metal matrix composites have been widely used in industries, especially aerospace industries, due to their excellent engineering properties. However, it is difficult to machine them because of the hardness and abrasive nature of reinforcement elements like silicon carbide particles (SiCp).In the present study, an attempt has been made to investigate the influence of spindle speed (N), feed rate...

The development of Al-Si alloy and its based material for engine application is reported in this paper, focusing on improving the material’s fatigue limit and wear resistance, which are two important properties for engine block materials. The paper begins with a description of the microstructure (primary and eutectic phases, intermetallics, and casting defects) of Al-Si alloy and its effects on...

In this study, the effects of passes number and cooling during friction stir processing (FSP) on the microstructure and properties of AZ31 magnesium alloy has been investigated. The process was carried out at tool rotational speed, transverse speed and tool tilt angle of 1100 rpm, 52 mm/min, and 3°, respectively. Cooling was performed by water. The microstructure of FSPed samples was explored b...

There are three main fuel brands for jet engines of civil aviation used: domestic TS-1 and RT foreign, produced in relatively small volumes Russia, JET A-1 (JET A-1). Since the end 2000s, foreign manufacturers have made claims to quality mass-used brand TS-1, these not been specified. However, service life a number operating on has reduced by 50%. This circumstance can be caused both subjective...

17-4PH stainless steel is a martensitic precipitation hardening stainless steel that provides an outstanding combination of high strength, good corrosion resistance, good mechanical properties, good toughness in both base metal and welds, and short time, low-temperature heat treatments that minimize warpage and scaling. This valuable alloy is widely used in the aerospace, nuclear, chemical, pet...

Mg-5wt.% Sn alloy is often used in portable electronic devices and automobiles. In this study, mechanical properties of Mg-5wt.% Sn alloy processed by Equal Channel Angular Extrusion (ECAE) were characterized. More precisely, its hardness and wear behavior were measured using Vickers hardness test and a pin-on-disc wear test. The microstructures of ECAE-processed Mg-Sn alloys were investigated ...

Engineered design of compression athletic wear has been selectively applied in various recognized Olympic sports and popular recreational activities. This recent development is, as one type of additional body-behavioural support, protection and adjustment, plays a crucial role, in improving the athletes’ performances. Typically, this is accomplished by providing engineered design support, press...

The importance of friction and wear control cannot be over emphasized for economic reasons and longterm reliability. The savings can be substantial, and these savings can be obtained without the deployment of investment. Tribology is crucial to modern machinery which uses sliding and rolling surfaces. This article describes the tribological behavior analysis for the conventional materials i.e. ...